US4392741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus
Assignee: Canon Inc
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Filing: 1981-12-09
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Granted: 1983-07-12
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Expires: 2001-12-09
Abstract
Abstract An image forming apparatus includes an image forming unit for forming an image on a recording medium, a command unit for commanding image forming conditions, a first switch for connecting a power source to the apparatus, a first detector for detecting an operational position of the first switch, a second switch for enabling the first switch to connect the power source to the apparatus, a second detector for detecting an operational position of the second switch, and a memory having microprograms stored therein for operatively controlling loads on the image forming unit. The operation of the image forming unit is controlled by signals derived from the first and second detectors and the microprograms.
Inventors
- 👤 Tsuneki Inuzuka
- 👤 Koichi Murakami
- 👤 Kenji Kurita
- 👤 Hisashi Sakamaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:08
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A copying apparatus comprising: means for forming an image on a copy medium including a movable component, first detecting means for detecting a first position of the movable component, first control means for returning the movable component to the first position corresponding to the first detecting means when the component is out of the first position before the copying operation starts, second detecting means for detecting a second position, different from the first position, after the copying operation is started, and second control means for stopping the copying operation in response to the second detecting means when the component fails to move to the second position.
Claim 2
Dependent Claim
106 words
A copying apparatus comprising: means for forming an image on a copy medium including a movable component, first detecting means for detecting a first position of the movable component, first control means for returning the movable component to the first position corresponding to the first detecting means when the component is out of the first position before the copying operation starts, second detecting means for detecting a second position, different from the first position, after the copying operation is started, and second control means for stopping the copying operation in response to the second detecting means when the component fails to move to the second position.
Claim 3
Dependent Claim
32 words
A copying apparatus according to claim 1 wherein said component is a reciprocable member for scanning an original image, and said first position is a starting position for starting the scanning operation.
Claim 4
Dependent Claim
24 words
A copying apparatus according to claim 1 wherein said second position is a position for feeding a copy medium to the image forming station.
Claim 5
Dependent Claim
34 words
A copying apparatus according to claim 1, further comprising means for inhibiting the copying operation when the component fails to move to or from the first position in response to said first control means.
Claim 6
Dependent Claim
166 words
A copying apparatus comprising: means for forming an image on a medium including a movable component, first detecting means for detecting a first position of the movable component, first control means for returning the movable component to the first position in response to the first detecting means when the component is out of the first position before the copying operation starts, means for inhibiting the copying operation when the component fails to move to the first position in response to said first control means, second detecting means for detecting the first position of the movable component after the copying operation is started, second control means for stopping the copying operation in response to the second detecting means when the component fails to reach the first position, and third detecting means for detecting a second position, different from the first position, for feeding a copy medium to the image forming station after the copying operations are started and before the second detecting means detects the first position.
Claim 7
Dependent Claim
166 words
A copying apparatus comprising: means for forming an image on a medium including a movable component, first detecting means for detecting a first position of the movable component, first control means for returning the movable component to the first position in response to the first detecting means when the component is out of the first position before the copying operation starts, means for inhibiting the copying operation when the component fails to move to the first position in response to said first control means, second detecting means for detecting the first position of the movable component after the copying operation is started, second control means for stopping the copying operation in response to the second detecting means when the component fails to reach the first position, and third detecting means for detecting a second position, different from the first position, for feeding a copy medium to the image forming station after the copying operations are started and before the second detecting means detects the first position.
Claim 8
Dependent Claim
32 words
A copying apparatus according to claim 5, wherein said second control means or said inhibit means operates in the absence of signals from said detecting means within a predetermined period of time.
Claim 9
Dependent Claim
104 words
A copying apparatus comprising: means for forming an image on a copy medium including a movable component, detecting means for detecting a position of the movable component, first control means for returning the movable component to the position corresponding to the detecting means when the component is out of the position before the copying operations start, means for feeding a copy medium to an image forming station in response to a predetermined positioning of said movable component after the copying operation is started, and second control means for inhibiting the copying operation in response to the detecting means when the component fails to move.
Claim 10
Dependent Claim
104 words
A copying apparatus comprising: means for forming an image on a copy medium including a movable component, detecting means for detecting a position of the movable component, first control means for returning the movable component to the position corresponding to the detecting means when the component is out of the position before the copying operations start, means for feeding a copy medium to an image forming station in response to a predetermined positioning of said movable component after the copying operation is started, and second control means for inhibiting the copying operation in response to the detecting means when the component fails to move.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |